While commenting on the efficiency of his crew, following the Enterprise's departure from Talos IV in 2254, CaptainPike inquired "what are we running here, a cadet ship, Number One? Are we ready or not?" (TOS: "The Cage")

Also during this time, cadets at Starfleet Academy were assigned to Class 2 shuttles for various training missions. According to B'Elanna Torres, these shuttles were often the cause of "Class 2 claustrophobia" for the cadets who served aboard them, as they were "fast, maneuverable, but not built for comfort." Tom Paris added that "they used to shoehorn half a dozen cadets into one of these things for weeks at a time," adding, "you did not want to be around when they opened up that airlock." (VOY: "Drone")